2-Minutes Timer / Reminder
The dentist recommended cleaning time for your teeth is 2 minutes, or 120 seconds. Oral-B electric toothbrushes include a 2-minute timer to help you brush for the dentist-recommended 2 minutes. From the moment the brush is turned on, a built in timer is activated. At the end of the 2 minute cleaning cycle, the motor in the brush will stutter (pauses and restarts briefly) three times.
This pausing of the brush motor causes the brushing sensation to change as well as the sound of the brush. This is your signal that the 2 minutes of brushing time has been achieved.
With Vitality models, the brush will stutter just once — after the 2 minutes is up, it won’t shut off but will simply stutter a little more noticeably to let you know that you’ve brushed for the recommended time.
Quadpacer / Quadrant Timer
Although not present in all Oral-B models, the vast majority have what Oral-B call a professional timer. Also known as the Quadpacer or Quadrant Timer, this is an additional feature which assists in the brushing routine.
With most other PRO series models, the brush will stutter or shake briefly every 30 seconds (Quadpacer) to let you know it’s time to move to another area of your mouth, and after the 2 minutes is up, the brush will stutter to let you know that you’ve brushed for the recommended time.
During a 2 minute cleaning cycle, there are four periods of 30 seconds. The idea behind the pacer is that you spend 30 seconds brushing each quadrant of the mouth.
Imagine breaking the mouth up into four sections, upper right, upper left, lower right and lower left. If you spend 30 seconds cleaning the surfaces of the teeth in each quadrant, by the end of the 2 minutes, you will have brushes evenly around the mouth.
If you have a Bluetooth enable toothbrush, the app will give visual representation of this timer and pacer feature on screen in real time.
Some Cleaning Modes have extra or shortened time
For oral-B model that has the Deep Clean (Pro Clean) mode and Whitening modes, the brush’s brushing/quadrant timer is lengthened to 3 minutes instead of just 2. While the Tongue cleaning mode is shorter than this at just 20 seconds.
Will it stop after the 2-minutes reminder is up?
When you are done brushing you’ll need to manually press the on/off switch to turn the toothbrush off, otherwise it will stay switched on. They don’t have an automatic cut-off because you might want to continue brushing to make sure you’ve got as good a clean as you’d like. After all, it’s your toothbrush to use as you wish!
Original post from Oral-B official site here